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EP2755408A1 - Procédé et dispositif de réception pour un service de diffusion non sélective/sélective multimédia - Google Patents

Procédé et dispositif de réception pour un service de diffusion non sélective/sélective multimédia Download PDF

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Publication number
EP2755408A1
EP2755408A1 EP13799898.5A EP13799898A EP2755408A1 EP 2755408 A1 EP2755408 A1 EP 2755408A1 EP 13799898 A EP13799898 A EP 13799898A EP 2755408 A1 EP2755408 A1 EP 2755408A1
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EP
European Patent Office
Prior art keywords
mbms
mbsfn areas
mbsfn
receiving
areas
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Granted
Application number
EP13799898.5A
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German (de)
English (en)
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EP2755408A8 (fr
EP2755408B1 (fr
EP2755408A4 (fr
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designation of the inventor has not yet been filed The
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ZTE Corp
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ZTE Corp
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Publication of EP2755408A8 publication Critical patent/EP2755408A8/fr
Publication of EP2755408A4 publication Critical patent/EP2755408A4/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/13—Cell handover without a predetermined boundary, e.g. virtual cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data

Definitions

  • the present invention relates to the field of communications, and in particular to a method and device for receiving a multimedia broadcast multicast service (MBMS).
  • MBMS multimedia broadcast multicast service
  • LTE Long-Term Evolution
  • 3GPP Third Generation Partnership Project
  • OFDM Orthogonal Frequency Division Multiplexing
  • MIMO Multiple Input Multiple Output
  • the bandwidth of 1.25-20 MHZ can be supported, so that the peak data rate and the system capacity are greatly improved, specifically, the peak rate of 100 Mbit/S for downlink and 50 Mbit/s for uplink is supported under the bandwidth of 20 MHz.
  • a flat network structure enhances the scheduling and the radio resource control efficiency, and shortens the continuous delay.
  • the MBMS has been supported in the third generation mobile communication system, and an Enhanced Multimedia Broadcast Multicast Service (eMBMS) being constructed in a fourth generation mobile communication LTE system is regarded as a service having a bright application prospect.
  • eMBMS Enhanced Multimedia Broadcast Multicast Service
  • PMCH Physical Downlink Multicast Channel
  • 3GPP protocol standard gives a complete solution.
  • 3GPP put forwards the MBMS which is a technology of transmitting data from a data source to multiple target mobile terminals so as to share internet (including a core network and an access network) resources and improve the utilization ratio of network resources (in particular to air interface resources).
  • the MBMS defined by 3GPP not only can realize the multicast and broadcast of the message in plain text and low rate, also can improve the broadcast and multicast of a high-speed multimedia service so as to provide a variety of abundant video, audio, and multimedia services, thereby providing a better service prospect for the development of 3G.
  • UE User Equipment
  • RRC Radio Resource Control
  • RRC_CONNECTED Radio Resource Control
  • RRC_IDLE RRC idle state
  • the present invention only researches the UE in the idle state. According to the fact that whether the UE is receiving a unicast service, it can be judged that whether the UE which is receiving an MBMS is in the connected state or in the idle state. Specifically, when the UE is receiving the unicast service, the UE is in the connected state. When the UE is in the idle state, an RRC connection is not established between the UE and the network side, and when the UE is in the connected state, an RRC connection is established between the UE and the network side.
  • RRC Radio Resource Control
  • the UE will read messages (wherein an MBMS control signalling which is carried on an MCCH of an MBMS control channel is called as an MCCH message) of a Broadcast Control Channel (BCCH) and a Multicast Control Channel (MCCH) to acquire resource configuration information of the MBMS in the target cell.
  • a Broadcast Control Channel BCCH
  • MCCH Multicast Control Channel
  • the target cell and the source cell belong to the same MBMS over a Single Frequency Network (MBSFN) area, that is, the target cell and the source cell both belong to this MBSFN area (the MBSFN area of the present invention is also abbreviated as MBSFN)
  • MBSFN Single Frequency Network
  • the UE can directly use the MBMS resource configuration information of the source cell (current cell) to receive the MBMS in the target cell without reading the resource configuration information of the MBMS in the target cell, and the contents of the MBMS are carried on the Multicast traffic channel (MTCH) of the MBMS to realize the continuity of the MBMS.
  • MBSFN Single Frequency Network
  • Each MBMS is carried on one MTCH channel, and each MTCH channel only carries the content of one MBMS, wherein reading an MTCH in the present invention refers to reading the content of the MBMS carried on the MTCH channel. If the target cell and the source cell belong to different MBSFN areas, then after entering the target cell, UE needs to read resource configuration information of the MBMS. If the MBMS which needs to be received by UE is not sent in the target cell, then after entering the target cell, the UE cannot read the resource configuration information of the MBMS and is also unable to receive the MBMS.
  • the receiving state of UE having the MBMS capacity includes being receiving an MBMS and being interested in receiving an MBMS. Being interested in receiving an MBMS refers to that UE has not received the MBMS and is prepared to receive the MBMS, under such case, the UE can monitor an MBMS notification message so as to further read the MCCH message and MBMS data according to the MBMS notification message.
  • BM-SC Broadcast-Multicast Service Centre
  • ESG electric service guide
  • the announcement can be sent by the following manners: MBMS carrying, or interactive modes, such as Hypertext Transfer Protocol (HTTP), or Picture Transfer Protocol (PTP) push mode, such as SMS, MMS, HTTP push.
  • HTTP Hypertext Transfer Protocol
  • PTP Picture Transfer Protocol
  • the content of the ESG is carried on a User Service Description (USD), a user can know in advance the MBMS service area (MBMS SA), which is represented by ⁇ TMGI, MBMS SAI list ⁇ on the USD, of each MBMS service (the MBMS service in the present invention also may be called a service, or is called MBMS for short) before the service starts by reading the content of the USD carried on the ESG, wherein a Temporary Mobile Group Identity (TMGI) corresponds to a certain MBMS, and the MBMS SAI list corresponds to a Service Area Identity (SAI) list of the service.
  • USD User Service Description
  • MBMS SA MBMS service area
  • SA Service Area Identity
  • the UE knows in advance the TMGI identities corresponding to multiple MBMS including the interested MBMS, the TMGI identity of which is assumed to be as TMGI1.
  • UE resides in a certain cell, if the user is interested in a certain MBMS (assuming that the TMGI identity of the interested MBMS is TMGI1), then the UE needs to find and initialize (begin) to read the TMGI1 through the following steps.
  • the UE reads a system information block (SIB) of the cell carried on the BCCH. If the UE is interested in a certain MBMS, then the UE needs to read SIB13 (an SIB numbered as 13), configuration information of one or more MCCHs is carried on the SIB13, and each MCCH corresponds to one MBSFN area.
  • SIB13 the UE can read: 1) the MBSFN area ID (MBSFN area identity) corresponding to each MCCH, and 2) configuration parameters of each MCCH (that is, which radio resources on which an MCCH is configured, so as to facilitate the UE to further read an MCCH message correctly on the radio resources).
  • each MCCH message carries MBSFN resources configured for the one MBSFN area corresponding to the MCCH message and scheduling information of all MBMSs of the MBSFN area (UE can know which MBSFN resources each MBMS is particularly scheduled on).
  • Each MBMS uniquely corresponds to one MTCH, that is, the content of each MBMS is uniquely carried on one MTCH.
  • the UE can read: 1) which radio resources all the MTCHs of the MBSFN area corresponding to the MCCH message are respectively configured on, and 2) which MTCH that the interested MBMS of the UE is further scheduled on.
  • the TMGI1 of the interested MBMS of the UE is configured on a certain MTCH of a certain MBSFN area.
  • the UE reads the content on the MTCH (such as MTCH1) corresponding to the interested service, and meanwhile, the UE needs to continue reading the MCCH message corresponding to the interested service.
  • the UE can continue reading the MTCH1 on the specified radio resources.
  • the UE reads the SIB13 (to acquire the configuration parameters of the MCCH); the UE reads the MCCH (to find which MTCH the interested service is carried on); and the UE reads the MTCH.
  • a cell selection or reselection flow is usually used to enter a target cell; and as for UE in the connected state, a cell switch flow is usually used to enter the target cell.
  • the cell selection or reselection belongs to the mobility of UE under the idle state.
  • the purpose of the cell selection or reselection is to ensure that the UE in the idle state resides in an optimal cell.
  • the cell selection or reselection is a necessary process mainly due to the reason that the mobility of the UE and the volatility of the wireless environment may cause the fluctuation of the signal strength and the interference level.
  • One UE resides in a source cell (original cell) and is in the state of being receiving a certain interested MBMS in this cell.
  • this UE moves to a new cell from the source cell and resides in the new cell through cell reselection, according to the fact whether the source cell and the new cell belong to the same MBSFN area, the mobility of the UE can be further classified into the UE moving in the same MBSFN area (also called: Intra-MBSFN area mobility), or the UE moving in different MBSFN areas (also called: Inter-MBSFN area mobility).
  • the UE After the UE resides in a certain cell of a certain MBSFN area (set as MBSFN1) and can read an interested MBMS in the cell, the UE moves to a new cell (set as cell2) from the current cell (set as cell1), under such case, the UE will read SIB13 of the new cell so as to know whether the MBSFN area or MBSFN areas is/are changed by comparing the MBSFN area or MBSFN areas of the new cell with that of the source cell, that is, whether cell2 belongs to the original MBSFN1, and whether the UE can continue receiving TMGI1.
  • a certain cell may be in the coverage area of multiple different MBSFN areas, that is, this cell is within the coverage area of overlapped MBSFN areas.
  • cell 1 is in the overlapped coverage area of ⁇ MBSFN1, MBSFN2 ⁇
  • cell 2 is in the overlapped coverage area of ⁇ MBSFN1, MBSFN3 ⁇ , as shown in Fig. 1 which is a schematic diagram of the state that UE moves among multiple MBSFN areas according to the related technologies.
  • the UE when the UE moves from cell 1 to cell 2, regarding MBSFN1, the UE is moving in the same MBSFN; however, regarding other MBSFN areas, the UE is moving in different MBSFNs. If the interested MBMS which is being received is carried in the MBSFN1 area, then the UE can receive the service both in cell1 and cell2, but if the interested MBMS which is being received is carried in MBSFN2, then when moving from cell1 to cell2, the UE may not be able to continue receiving the service in cell2.
  • the prior art of 3GPP it is always supposed that the MBMSs configured on two adjacent MBSFN areas are different, that is to say, the prior art only describes the service continuity (the continuity in the present invention refers to that whether the UE can receive the same MBMS when the UE moves between two cells) when the UE moves in the same MBSFN area.
  • the continuity in the present invention refers to that whether the UE can receive the same MBMS when the UE moves between two cells
  • the present invention provides a method and device for receiving a multimedia broadcast multicast service to at least solve the technical problem in the related art that there is no solution to the continuity of receiving the same service when UE moves in different cells among different MBSFNs.
  • a method for receiving a multimedia broadcast multicast service including: user equipment (UE) receiving a specified MBMS which is carried in one or more MBMS over a single frequency network (MBSFN) area to which a source cell where the UE is currently located belongs; after the UE performs cell reselection and resides in a target cell, in the case that the UE determines that one or more MBSFN areas to which the target cell belongs are different from one or more MBSFN areas to which the source cell belongs, the UE acquiring a condition of one or more MBMSs which are carried in the one or more MBSFN areas to which the target cell belongs; and the UE continuing receiving the specified MBMS in the target cell according to the acquired MBMS condition.
  • UE user equipment
  • MBSFN single frequency network
  • the UE continuing receiving the specified MBMS according to the acquired MBMS condition includes: when the MBMS condition is that the specified MBMS is not carried in any of the one or more MBSFN areas to which the target cell belongs, the UE continuing receiving the specified MBMS according to configuration parameters provided by the source cell.
  • the UE continuing receiving the specified MBMS according to the acquired MBMS condition includes: when the MBMS condition is that the specified MBMS is carried in part of the MBSFN areas to which the target cell belongs, the UE selecting one or more MBSFN areas from the part of the MBSFN areas according to a predetermined strategy to continue receiving the specified MBMS.
  • the part of the MBSFN areas includes one or more MBSFN areas to which the source cell belongs.
  • the UE selecting one or more MBSFN areas from the part of the MBSFN areas according to the predetermined strategy to continue receiving the specified MBMS includes: the UE preferentially selecting one or more MBSFN areas to which the source cell belongs from the part of the MBSFN areas to continue receiving the specified MBMS.
  • the UE After the UE selects multiple MBSFN areas from the part of the MBSFN areas to continue receiving the specified MBMS, the UE combines the specified MBMS received from the multiple selected MBSFN areas.
  • the predetermined strategy includes one of the following: selecting one or more MBSFN areas at random from the part of the MBSFN areas; and selecting one or more MBSFN areas according to signal quality of one or more MBMSs carried in each MBSFN area in the part of the MBSFN areas.
  • the UE receiving the specified MBMS which is carried in the one or more MBSFN areas to which the source cell where the UE is currently located belongs includes: the UE selecting one or more MBSFN areas from the multiple MBSFN areas to which the source cell belongs to receive the specified MBMS.
  • a device for receiving a multimedia broadcast multicast service which is located in user equipment (UE), includes: a receiving module configured to receive a specified MBMS which is carried in one or more MBMS over a single frequency network (MBSFN) area to which a source cell where the UE is currently located belongs, and continue receiving the specified MBMS according to a condition of one or more MBMSs which are carried in one or more MBSFN areas to which the target cell belongs, which is acquired by an acquisition module, wherein the target cell is a cell where the UE resides after performing cell reselection; a determination module configured to, after the UE performs cell reselection and resides in the target cell, determine that the one or more MBSFN areas to which the target cell belongs are different from one or more MBSFN areas to which the source cell belongs; and an acquisition module configured to, in the case that the determination module determines that the one or more MBSFN areas to which the target cell belongs are
  • MBSFN single frequency network
  • the receiving module is further configured to, when the MBMS condition is that the specified MBMS is not carried in any of the one or more MBSFN areas to which the target cell belongs, continue receiving the specified MBMS according to configuration parameters provided by the source cell.
  • the receiving module is further configured to, when the MBMS condition is that the specified MBMS is carried in part of the MBSFN areas to which the target cell belongs, select one or more MBSFN areas from the part of the MBSFN areas according to a predetermined strategy to continue receiving the specified MBMS.
  • the receiving module is further configured to, in the case that there are multiple MBSFN areas to which the source cell belongs, select one or more MBSFN areas from the multiple MBSFN areas to which the source cell belongs to receive the specified MBMS.
  • the UE after the UE performs cell reselection and resides in a target cell, in the case that the UE determines that one or more MBSFN areas to which the target cell belongs are different from one or more MBSFN areas to which the source cell belongs, the UE continues receiving a specified MBMS in the target cell according to a required MBMS condition, so as to solve the technical problem in the related art that there is no solution to the continuity of receiving the same service when UE moves in different cells among different MBSFNs, thus being capable of keeping the continuity of an MBMS service when the UE moves among different MBSFNs.
  • Fig. 2 is the flowchart of a method for receiving a multimedia broadcast multicast service according to an embodiment of the present invention. As shown in Fig. 2 , the method includes:
  • UE continues receiving the specified MBMS service according to the condition of one or more MBMSs which are carried in the one or more MBSFN areas to which the target cell belongs in the case that UE determines that the one or more MBSFN areas to which the target cell belongs are different from one or more MBSFN areas to which the source cell belongs, so as to solve the problem that there is no solution to the continuity of receiving the same service when UE moves in different cells among different MBSFNs and further solve the problem of being unable to keep the continuity of receiving the same service caused by moving in different cells, so that the UE can still keep the continuity of receiving the same service when the UE moves out of the current MBSFN area.
  • Step S202 can be implemented in following realization forms: when UE begins to receive an interested MBMS (that is, the specified MBMS), the UE can know that the interested MBMS is carried in one or more MBSFN areas on the current cell. The UE reads (that is, receives) the same interested MBMS which is carried in one or more MBSFN areas therein.
  • Steps S204 and S206 can be implemented in the following implementation processes: after UE moves to a new cell, if the new cell does not carry the interested MBMS, then the UE adopts relevant configuration parameters provided by the source cell to receive the interested MBMS which is received previously as far as possible so as to keep the service continuity of the service. After the UE moves to a new cell, if the new cell carries the interested MBMS, then the UE can know that the interested MBMS can be carried in one or more MBSFN areas on the current cell, and the UE reads (that is, receives) the same interested MBMS which is carried in one or more MBSFN areas therein.
  • the UE can read the interested MBMS from multiple MBSFN areas, the UE can select one of the MBSFN areas to read the interested MBMS, the UE can also combine the contents of the MBMS obtained from the multiple different MBSFN areas so as to improve the receiving gain.
  • the combining ways can be soft combining or selective combining, and also can be the combination of various combining methods.
  • the UE adopts different receiving methods to continue receiving the above-mentioned specified MBMS according to different MBMS conditions, which specifically may include, but are not limited to the following several conditions:
  • the UE After selecting multiple MBSFN areas from the above-mentioned part of the MBSFN areas to continue receiving the specified MBMS, the UE combines the specified MBMS received from the multiple selected MBSFN areas so as to improve the receiving gain of the specified service.
  • the above-mentioned predetermined strategy includes one of the following: selecting one or more MBSFN areas at random from the part of the MBSFN areas; and selecting one or more MBSFN areas according to the signal quality of one or more MBMSs which are carried in each MBSFN area in the part of the MBSFN areas.
  • UE may select one or more MBSFN areas from the multiple MBSFN areas to which the source cell belongs to receive the specified MBMS.
  • the present embodiment also provides a device for receiving a multimedia broadcast multicast service, the device is located in user equipment for realizing the above-mentioned embodiments and preferred implementations, which has been described and will not be repeated, and modules involved in the device are described below.
  • the term "module" can be the combination of software and/or hardware which can realize the predetermined functions.
  • the device described by the following embodiments is preferably achieved by software, but the realization of hardware or the combination of software and hardware is also possible and can be conceived.
  • Fig. 3 is a structural block diagram of a device for receiving a multimedia broadcast multicast service according to an embodiment of the present invention. As shown in Fig. 3 , the device includes:
  • UE continues receiving the specified MBMS service according to the condition of the one or more MBMSs which are carried in one or more MBSFN areas to which the target cell belongs in the case that UE determines that the one or more MBSFN areas to which the target cell belongs are different from one or more MBSFN areas to which the source cell belongs, so as to solve the problem that there is no solution to the continuity of receiving the same service when UE moves in different cells among different MBSFNs and further solve the problem of being unable to keep the continuity of receiving the same service caused by moving in different cells, so that the UE can still keep the continuity of receiving the same service when the UE moves out of the current MBSFN area.
  • the above-mentioned receiving module 30 is also configured to, when the MBMS condition is that the specified MBMS is not carried in any of the one or more MBSFN areas to which the target cell belongs, continue receiving the specified MBMS according to configuration parameters provided by the source cell.
  • the above-mentioned receiving module 30 is also configured to, when the MBMS condition is that the specified MBMS is carried in part of the MBSFN areas to which the target cell belongs, select one or more MBSFN areas from the above-mentioned part of the MBSFN areas according to a predetermined strategy to continue receiving the specified MBMS.
  • the above-mentioned receiving module 30 is also configured to, in the condition that there are multiple MBSFN areas to which the source cell belongs to, select one or more MBSFN areas from the multiple MBSFN areas to which the above-mentioned source cell belongs to receive the specified MBMS.
  • the scene is not the researched scenario of the following embodiment, that is to say, the application scenario of the following embodiment is that UE is always supposed to begin to receive the interested MBMS in at least one MBSFN area of the one or more MBSFN areas to which the current cell belongs.
  • the interested MBMS may be received on all of the one or more MBSFNs.
  • the method for UE to begin to receive the service in the source cell can be found in embodiment 1.
  • the method for the UE to continue receiving the service on the new cell in embodiment 2 can be adopted to enable the UE continue receiving the interested MBMS which is carried in certain/some MBSFNs of the source cell.
  • the interested MBMS can be received in only one MBSFN area of the current cell.
  • the present embodiment provides a method for the UE to begin to receive the interested MBMS, and also provides a method regarding how UE combines the same MBMS content of multiple MBSFN areas.
  • UE has known in advance the TMGI identity of the interested MBMS, and the UE resides in a certain cell and begins to receive the interested MBMS.
  • the cell belongs to one or more MBSFN (overlapped) areas, and the UE can read the interested MBMS in at least one MBSFN area therein.
  • the UE may select one MBSFN therefrom, or may select multiple MBSFNs therefrom to receive the interested MBMS in this/these MBSFN areas.
  • the selection manner may be that the UE selects one MBSFN from these MBSFNs at random, and also may be that UE selects one according to the signal strength and the signal quality of one or more MBMSs in these MBSFN areas.
  • the method for selecting multiple MBSFNs therefrom and receiving on these MBSFNs by the UE is similar to that of selecting one MBSFN.
  • UE resides in one cell, and the cell belongs to one or more MBSFN areas, when the UE begins to receive the interested MBMS, if the UE can receive the interested MBMS in multiple MBSFN areas at the same time, then:
  • the present embodiment provides a method for UE which is receiving the interested MBMS in a certain cell (the source cell) to continue receiving the MBMS after residing in a new cell through cell reselection.
  • Fig. 4 is a flowchart of UE continuing reading MBMS in a new cell according to an embodiment of the present invention, as shown in Fig. 4 , the present embodiment also provides a method as regards how UE combines the content of the same MBMS acquired in multiple MBSFN areas.
  • the present embodiment adopts the following technical solutions.
  • Step S402 UE receives service TMGI1 in MBSFN1 of the source cell.
  • Step S404 UE is cell-reselected to a new cell.
  • Step S406 UE reads the message of SIB13 of the current new cell.
  • Step S408 it is compared whether one or more MBSFN areas to which the new cell belongs are completely the same as that to which the source cell belongs; if yes, then turns to Step S410, otherwise turns to Step S412.
  • Step S410 if the source cell and the new cell both belong to the completely same MBSFN overlapped area or areas, then the method for the UE to read the interested MBMS is completely the same as that of the source cell. That is, the UE still reads the interested MBMS on the same one or more MBMS areas, and the flow ends.
  • Step S412 if the source cell and the new cell belong to the MBSFN overlapped areas which are not completely the same, it is judged whether an SIB13 area is configured for the new cell, that is, it is judged whether the new cell does not belong to any MBSFN area, if the new cell does not belong to any MBSFN area, turns to Step S414, otherwise turns to Step S416.
  • Step S414 if no SIB13 message is configured for the new cell, then it means that the UE moves out of all the MBSFN areas, then UE continues reading MCCH messages and continues reading the interested MBMS on configuration resources of MCCH that the source cell indicates as far as possible, and the follow ends.
  • Step S416 it is judged that whether the MBSFN area for carrying the MBMS being received is included in the one or more MBSFN (overlapped) areas to which the cell belong indicated in the SIB13 message in the new cell, if yes, turns to Step S418; otherwise, turns to Step S426.
  • Step S420 it is judged that whether the new MBSFN area carries the MBMS which was being read previously, that is, it is judged whether there is TMGI1 on other MBSFNs, if yes, turns to Step S424, otherwise, turns to Step S422.
  • Step S422 if the MBMS which was being read previously cannot be carried in any of the MBSFN areas of the new cell, then UE continues reading MCCH messages on the MCCH configuration resource indicated by the source cell as far as possible and continues reading the interested MBMS as far as possible.
  • Step S424 if the MBMS which was being received previously can be carried in one or more MBSFN areas of all the MBSFN areas of the new cell, then UE can read the MBMS which was being received previously on at least one MBSFN area in this/these MBSFN areas.
  • UE can select to receive the MBMS which was being received previously carried in one or more MBSFN areas.
  • the method for UE to select one MBSFN area from the multiple MBSFN areas to receive MBMS may be that UE selects one MBSFN at random, and also may be that UE selects one according to the signal strength and the signal quality of one or more MBMSs on these MBSFN areas.
  • the method for UE to select multiple MBSFNs from these MBSFNs is similar.
  • UE can also continue reading MCCH messages and continue reading the interested MBMS on configuration resources of MCCH that the source cell indicates as far as possible.
  • the UE can not only continue receiving the MBMS on the original MBSFN area, at the same time, the UE also can determine that whether the MBMS which was being read previously can be carried in one or more new MBSFN areas by further reading MCCH messages of other areas. Therefore, the method may further include:
  • the UE can select one MBSFN therefrom, also can select multiple MBSFNs therefrom to receive the MBMS which was being received previously.
  • the method that the UE selects one MBSFN area from all the multiple MBSFN areas (including the original MBSFN) to receive MBMS is also allowed. Further, the selection method may be that UE selects one MBSFN therefrom at random, and also may be that UE selects one according to the signal strength and the signal quality of one or more MBMSs on these MBSFN areas.
  • the UE also can select multiple MBSFNs therefrom and receive on these MBSFNs, the method is that UE selects multiple MBSFN areas therefrom to receive the interested MBMS.
  • UE can select multiple MBSFNs therefrom at random, and also may be that UE selects multiple MBSFNs according to the signal strength and the signal quality of one or more MBMSs on these MBSFN areas, then the UE receives the interested MBMS on these MBSFN areas.
  • the UE can read the interested MBMS from multiple MBSFN areas, the UE can combine the contents of the MBMS obtained from multiple different MBSFN areas to improve the receiving gain.
  • the combining ways can be soft combining or selective combining, and also can be the combination of various combining methods.
  • UE knows in advance the TMGI of the interested MBMS which is assumed to be TMGI1, and the UE resides in a certain cell (assuming the source cell is cell1) to find and read the content of TMGI1 (the interested MBMS).
  • the UE When the UE reselects from the source cell (cell1) to a new cell (assuming the new cell is cell2) through cell reselection, the UE reads SIB13 in cell2 and learns which MCCH(s) the cell2 is configured on so as to know which MBSFN area(s) cell2 belongs to. There will be three results:
  • Step S426 UE reads the messages of MCCHs of other MBSFN areas, and turns to Step S428.
  • Step S430 UE continues reading MCCH1 and TMGI1 as far as possible.
  • Step S432 UE continues reading the service on MBSFN which carries TMGI1.
  • Fig. 5 is a schematic diagram of UE moving out of the MBSFN area according to an embodiment of the present invention, particularly as shown in Fig. 5 .
  • UE moves out of the coverage area of the MBSFN.
  • the UE resides in a new cell cell 2 from the source cell cell1 through cell reselection, the UE is unable to read SIB13 and thus is unable to obtain the configuration information of any MCCH.
  • this embodiment is further divided into two scenes.
  • UE can read the contents of MCCH1 and MTCH1.
  • the UE In cell 2, the UE cannot read the contents of MCCH1 and MTCH1.
  • the result 1-1) appears because although cell2 does not belong to the coverage area of MBSFN1, due to the gain of the MBSFN macro diversity of MBSFN1, the signals of MCCH1 and MTCH1 of MBSFN1 are very strong and exceed the coverage area of cell1 and extend to the coverage area of cell2.
  • the appearance of such result also needs that the configuration parameters of the MCCH1 are not changed (that is, the configuration parameters of MCCH1 being not updated as regards on SIB13). Since UE can read MCCH1 correctly, then the UE can read MTCH1 and read the content of TMGI1 correctly, which is represented as that the service is still continuous.
  • the reason for the appearance of this result is also possibly that the configuration parameters of the MCCH1 have been changed, since the UE cannot read the configuration information of the MCCH1 in SIB13 on cell1, the UE does not know the new configuration parameters of the MCCH1, which results in that the content of MCCH1 and the content of MTCH1/TMGI1 are not able to be read.
  • Fig. 6 is a schematic diagram of UE continuing receiving the service as far as possible in a non-MBSFN area according to an embodiment of the present invention, as shown in Fig. 6 , UE moves from a point A of cell1 in Fig.
  • Fig. 7 is a schematic diagram of UE continuing receiving the service after moving out of the original MBSFN area and entering a new MBSFN area according to an embodiment of the present invention, specifically as shown in Fig. 7 .
  • the scene of this embodiment also belongs to a scene of UE moving out of the MBSFN area, what is different from embodiment 2 is that in cell 2, UE can read relevant information of other MBSFN areas, the UE moves out of the MBSFN1 and enters other MBSFN areas at the same time.
  • the method for UE to receive and process MCCH1 is the same as the result scene 1), on the other hand, the UE can read configuration information of other MCCHs by reading SIB13 and can read the contents of other MCCHs, and the UE can obtain different results according to the contents of this/these MCCHs:
  • the new cell cell2 in which the UE resides belongs to multiple other MBSFN areas (such as MBSFN2/3/4/..., but MBSFN1 is not included).
  • MBSFN overlapped coverage areas to which cell2 belongs for example, UE can obtain the content of TMGI1 from one or more MBSFN areas of MBSFN2/3/4/5 areas (such as MBSFN2 and/or MBSFN4).
  • the specific method is that UE reads SIB13 of cell2, if cell2 belongs to an overlapped coverage area of MBSFN2/3/4/5, the configuration information of MCCH2/3/4/5 corresponding to these four areas one to one can be read, then the UE reads each MCCH message on radio resources corresponding to each MCCH so as to know that the configuration and scheduling information of MTCH1 (corresponding to TMGI1) are respectively indicated on MCCH2 and MCCH4, and finally, the UE reads MTCH1 (that is, the content of TMGI) on the radio resource indicated by MCCH2 and MCCH4.
  • UE can read MCCH1 on cell2, that is, the UE can read, on cell 2, both TMGI 1 which is carried in other MBSFNs and also may read TMGI1 which is carried in the MBSFN1.
  • UE can adopt a combining method (such as soft combining, or selective combining) to combine the contents of multiple TMGI1 acquired from different MBSFN areas (MBSFN1 can also be included) so as to improve the receiving gain.
  • SIB13 is present in the cell and the cell has configuration information of MCCH1, it means that although UE is reselected from cell1 to cell2, the new cell cell2 and the cell 1 still belong to the same one MBSFN1 area, and therefore, the switch belongs to the intra-MBSFN area switch with regard to the MBSFN1.
  • MBSFN1 other MBSFN areas of cell1 and cell 2 are different, and with regard to other MBSFN areas (except MBSFN1), the case belongs to moving out of one or more MBSFN areas and entering one or more new MBSFN areas.
  • FIG. 8 is a schematic diagram of UE continuing receiving the service after entering a new MBSFN area but not moving out of the original MBSFN area according to an embodiment of the present invention, as shown in Fig. 8 , in cell 2, it still belongs to the coverage area of MBSFN1, which moves out of the coverage area of MBSFN2 but enters the coverage area of MBSFN3 and MBSFN4 at the same time.
  • the UE After UE performs cell reselection and resides in cell2, the UE reads SIB13 of cell2 so as to obtain the configuration information of several MCCHs, not only the UE can know that cell 2 still belongs to MBSFN1, but also the UE can know which MBSFN area(s) cell2 belongs to, that is, whether the MBSFN areas of cell2 are completely the same as the MBSFN areas of cell1.
  • this embodiment 3 may further include the following two scenes.
  • the adoption of the above-mentioned technical solution of the embodiments of the present invention is capable of keeping the continuity of an MBMS service when the UE moves among different MBSFNs.
  • a storage medium is also provided, the above-mentioned software is stored in the storage medium, and the storage medium compares but is not limited to disks, floppy disks, rigid disks, erasable storages and so on.
  • each of the mentioned modules or steps of the present invention can be realized by universal computing systems; the modules or steps can be focused on single computing device, or distributed on the network formed by multiple computing devices; selectively, they can be realized by the program codes which can be executed by the computing system; thereby, the modules or steps can be stored in the storage system and executed by the computing system; and under some circumstances, the shown or described steps can be executed in different orders, or can be independently manufactured as each integrated circuit module, or multiple modules or steps thereof can be manufactured to be single integrated circuit module, thus to be realized. In this way, the present invention is not restricted to any particular hardware and software combination.

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EP13799898.5A 2012-06-05 2013-06-04 Procédé et dispositif pour recevoir un service de diffusion non sélective/sélective multimédia Active EP2755408B1 (fr)

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CN2012101829658A CN103458371A (zh) 2012-06-05 2012-06-05 多媒体广播多播业务的接收方法及装置
PCT/CN2013/076738 WO2013182043A1 (fr) 2012-06-05 2013-06-04 Procédé et dispositif de réception pour un service de diffusion non sélective/sélective multimédia

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WO2018012810A1 (fr) * 2016-07-11 2018-01-18 엘지전자 주식회사 Procédé destiné à transmettre un message d'indication d'intérêt mbms au moyen d'un terminal et dispositif prenant en charge ce dernier
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EP2755408B1 (fr) 2018-12-26
WO2013182043A1 (fr) 2013-12-12
US20140140237A1 (en) 2014-05-22
EP2755408A4 (fr) 2015-06-24

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